Self-feeding smoke-consuming furnace.



Patented Nov. 2|, I899.

No. 637,73l.

G. GROLL.

SELF FEEDING SMOKE CONSUMING FURNACE (Application filed Dec. 30, 1897.)

4 Sheets-Sheet I.

(No Model.)

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N0- 637,73l. Patented Nov. 2|, I899.

C. GROLL. SELF FEEDING SMOKE GONSUMING FURNACE.

(Application filed Dec. 30, 1897.)

(No Model.)

4 Sheets-Sheet 2.

w J7ZV62 271 j i A THE NORRIS PETE CO" PKU'TMIYHOW WASHINGTON D- No. 637,73l. Patented Nov. 2|, I899. G. GROLL.

SELF FEEDING SMOKE GONSUMING FURNACE;

(Application filed Dec. 80, 1897.)

(No Model.) 4 Sheets-Sheet 3.

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No. 637,731. 7 Patented Nov. 2!, I899.

' C. GROLL.

SELF FEEDING SMOKE CONSUMING FURNACE.

(Application filed Dec. 80, 1897.) (No Model.) 4 SheatsSheet 4.

FIGS].

UNITED STATES- PATENT (dnnrcn.

OHARLESGROLL, OF ROUBAIX, FRANCE.

SELF-FEEDING SMOKE-CONSUMING FURNACE.

SPECIFICATlION forming part of Letters Patent No. 637,731, dated November 21, 1899.

Application filed December 30, 1897. Serial No. 664,647. (No model.) a

T0 at whom it may concern:

Be it known that 1, CHARLES GROLL, of Roubaix, Nord Department, in the Republic of France, have invented new Improvements in Self-Feeding Smoke-Consuming Furnaces, (for which I have obtained under date of October 7, 1897, a certificate of addition to my French patent, No. 256,099, of May 30, 1896;) and I do hereby declare that the following is a full and exact description thereof, reference being made to the accompanying drawings.

My invention has for its object several improvements in the class of furnaces which are fitted for consuming the smoke and in which the fuel is automatically distributed onto a grate having a continuous or intermit tent rotatory movement.

My invention has more particularly forits object improvements in the rotatory grate and self-feeding smoke-consuming furnace which is described ,in the Letters Patent granted to me under the No. 578,146, said Letters Patent being for the same subjectmatter as the French patent, No. 256,099, above mentioned.

These improvements relate particularly to the self-acting coal-feeder, to which I give a shaking movement, and to the coal-distributer, which is provided with a device enabling wet coal to be used.

Other novel features of the invention will appear from the description following hereinafter.

The accompanying drawings show the new improvements in all their details.

In the said drawings, Figures 1 to 3 are general views of the furnace as established according to the new construction. Fig. 1 is a vertical section through the boilers and on the line 1 2 3 4: of Fig. 2. Fig. 2 is a longitudinal section on the line 5 6 of Fig. 1. Fig. 3 is a sectional plan on the line 7 8 of Fig. 1. Figs. 4:. and 5 are respectively a longitudinal section and a transverse section of the coaldistributer. Fig. 6 refers to a modified construction of the grate-ring with water circulating therein.

larger scale, of the radial feed-chamber.

By referring to the drawings it will be seen that the grate-support consists of a toothed ring a, moving on four rollers b, more or less, fitted in supports 7), fixed in the masonry of Fig. 7 is a detail view, on a the ash-pit. Six radial arms 0 are mounted on a common hub O and rest at their outer ends on the ring a, which is provided with recesses to receive the said ends. The said arms are provided with a series of apertures intended to receive the heels of the grateplates, which they support. Six other radial arms 61 rest on supporting-lugs of the hub O and of the ring a, and they, together with the armsc, constitute the supports of the gratebars.

The hub O rotates on a standard It, fixed to the bottom of the ash-pit and covered by a cone h, turning with the hub, to prevent ashes or cinders from interfering with the rotary movement in penetrating between the surfaces which arein contact with each other.

The outer grate-bars rotate under a ring A, made in several segments in order to allow of the expansion of each of its parts or plates.

The said plates rest on a ring B, fixed entirely in the masonry, so that the said ring, which is not exposed to the fire, prevents the plates or segments A from becoming unlevel. By

this means the grate can be fitted very near.

to the said plates, but without giving rise to friction,whereby very small power is required for the rotatory movement. Furthermore, air from the ash-pit cannot pass in excess through the joints, which, on the other hand, are always covered with coal. The ring and the grate can freely expand, even when they are not cooled by steam from the blast-pipes when the engine is started, for instance, or when a fan is employed for obtaining a draft.

I may replace the plates A and the ring B by a single ring 0, tubu'lar in cross-section and in which a circulation of water may be established. This arrangement is shown in section in Fig. 6.

The furnace arranged as hereinbefore decan be obtained either by varying the number of cells or by changing the dimensions of the same. The coal-discharging capacity of the distributor therefore increases in such a manner that the series of cells which'supplies the fuel to the central portion of the grate has the smallest capacity and that series of cells which supplies the fuelto the peripheral portion of the'grate has the largest capacity.

A particular arrangement insures the dis-' charge of the. coal from the cells when the latter are filled with wet coal, which is often met with. A cellular cylinder 1 revolves in the double bottom 2 of casing3 by means of platetrunnions 4 4. The said cylinder, which is:

hollow, surrounds a fixed core 5, pinned at one of its ends to'one of the bottoms of the i A series of brushes 6, pivoted at 5 7, are held against the cylinder by springs 8. l The coal, coming from the upper hopper, en-

casing 3.

ters into the cells, where it is held by the at the moment when the said tappet registers with the cell.

with it. The regular discharge of the coal, however wet it may be, is thus insured.

Each series of cells 0 discharges the coal into the corresponding channels 19 of the inclined coa1-distributer,Fig. 2, suspended from a connecting-rod q and receiving a shaking movement from an eccentric 'r in order to cause the coal to fall down. in the small grooves 8 made in the bottom of .each channel 13, Fig. 12, in order to assist in its being equallydistributed along the ,ob-

liquel-ycut ends'of the channels, so that the surface of the grate may be supplied with coal in a perfectly-uniform manner.

The inclined coal-distributer is housed in a cast-iron casingF, which is protected against the effects of fire or heat by bricks of suitable shape, and there is cast on the side and along the said casing a lateral pipe G, .closed by a removable wall 25, and into which is sent, .by means of a steam-injector arranged at H, the blast of air necessary for the combustion of the gases above the grate. The air enters into the furnace in very small jets '11., which have also the advantage of preventing the gases of combustion from moving vup into the casing of the coal-distributer.

The casin g F issuspended from the boilers by two bars "1; and 22. The distributor itself is suspended between the boilers, as herein, before described, by a connectingrod q, whereby a very light and noiseless reciprocating movement can be given to it.

I c a m 1, An improved smoke-consuming furnace comprising a rotary grate, a casing located radially above the grate and spaced therefrom,

The tappet is then closed 1 by the pressure of the solid parts of the mov- 1 ing cylinder 1 until a fresh aperture registers The coal slides acoal-distributer providedwith a spring-actuated coal ejector, a .coalfeeder .Imovably mounted in said casing and having inclined channels arranged to receive coal from said distributor and to deliver it upon the grate, and means for shaking the coal-feeder.

2,. In a furnace, a coal-feeder comprising parallel inclined channels, a housing for said channels, links by which said housing is suspended, and mechanism for imparting a shaki-ng motionto the suspended housing.

3-. An improved smoke-consuming furnace having an "oscillating coal-feeder, in combination with a cellular coal-distributer provided with a spring-actuated device which forces the coal filling each cell to become disengaged from the same, even when the said coal is wet, at the moment such cell passes above the coal-feeder, substantially as described, and for the purpose specified;

4. An improvedsmoke-consuming'furnace having an oscillating coal-feeder and a cellula'r distributer provided with a device for dis engaging the coal, substantially as described, and for the purpose specified.

, 5. The combination with the rotary grate, of a fuel-distributer comprising a rotary cylinder having aplurality of series of cells or chambers, each series having a difierent capacity from the adjacent series, a channel for feeding the fuel to the distributer, and separate channels for conveying the fuel fro-m each series of cells to the grate, said conveyingechannels being so arranged that the series of cells having the largest capacity supplies fuel for the outer portion of the grate, while the series of cells having the smallest capacity supplies fuel for the central portion of the grate.

6. The combination with the rotary grate,

of a fuel-distributer comprising a rotary cylingler having a plurality'of series of cells or chambers, the width of said series increasing from one end of the cylinder to the other, a channel for feeding the fuel to the distributer, and separatechannels for conveying the fuel from each series of cells tothe grate, the channel leading from the widest series of cells being arranged to dischage fuel upon the outer portion of the grate, while the channel leading from the narrowest series of cells is arranged to discharge fuel upon the central portion of the grate.

7, A fuel-distributer comprising a rotary cellular or chambered cylinder, a, stationary core upon which said cylinder is mounted, and an outwardly-movable tappet or ejector located upon said core and adapted to enter the cylinder-chambers to discharge the fuel therefrom.

In witness whereof I have hereunto set my hand in presence of two witnesses.

CHARLES GROLL.

Witnesses:

GALTIER L J ULES DUBEY. 

